Home
PRoblems
Submissions
Users
Organizations
Contests
Tag
About
FAQ
Judges
Devlog
Github
Tickets
Wiki
Thư viện đề thi
Log in
or
Sign up
This site works best with JavaScript enabled.
Problem list
List
«
1
2
3
4
5
6
...
57
58
»
Problem search
Has editorial
Show problem types
Category
All
---
Asia-Pacific Informatics Olympiad
Atcoder
Bedao Contest
Chưa phân loại
COCI
Duyên Hải Bắc Bộ
Educational Codeforces
Free Contest
GSPVH
HNOI
HSG Quốc gia
ICPC
International Olympiad in Informatics
Japan OI
OI Style
Olympic 30/4
Olympic chuyên KHTN
Olympic Sinh Viên
Tin học trẻ
TST Training
USACO
VNOI Cup
VNOI Marathon
VNOI Online
VNUOI
VOJ
Problem types
2 con trỏ
2-satisfiability
Ad hoc (không thuộc thể loại nào)
Aho Corasick
Balanced BST (cây nhị phân cân bằng)
Bao lồi
Bitwise
C++ STL (Heap, Set, Map, ..)
Cặp ghép
Cặp ghép có trọng số
Cặp ghép trên đồ thị thường
Cây khung nhỏ nhất
Chia đôi tập
Chu trình Euler
Chưa phân loại
DFS / BFS
Disjoint set (DSU)
Divide & Conquer (Chia để trị)
Duyệt
Fast Fourier Transform (FFT)
Fenwick Tree (Binary Indexed Tree)
Fenwick Tree 2D
Hashing
Heavy Light Decomposition
Hình học
Khử Gauss
KMP
Knuth Optimization
LCA
Luồng
Luồng mincost
Lý thuyết trò chơi - Adhoc
Lý thuyết trò chơi - Grundy
Lý thuyết trò chơi - Nim
Manacher
Mảng cộng dồn
Monotonic Queue
Nhân ma trận
Output Only
Quy hoạch động
Quy hoạch động bao lồi
Quy hoạch động bitmask
Quy hoạch động chữ số
Quy hoạch động thứ tự từ điển
Quy hoạch động trên cây
Rời rạc hóa
Segment Tree (Interval Tree)
Số học
String (xâu nói chung)
Suffix Array / Suffix Automaton / Suffix Tree
Sweep line
Tham lam
Tìm kiếm nhị phân (Binary search)
Tổ hợp
Toán - adhoc
Trie
Xử lý số lớn
Z-function
Đồ thị
Đường đi ngắn nhất - Dijkstra
Đường đi ngắn nhất - Floyd
Point range
Go
Random
Hot problems
Free Contest 71 - SOCCER
Free Contest 140 - STRONGPASSWD
Free Contest 97 - TV
Free Contest Testing Round 20 - SEQ51
Free Contest 67 - DIKE
Free Contest 69 - CALSUM
Free Contest 132 - EXPONENTIAL
ID
Problem
Category ▴
Points
% AC
# AC
bedao_r07_lis
Bedao Regular Contest 07 - LIS
Bedao Contest
0.20
20.9%
337
bedao_r07_mtcat
Bedao Regular Contest 07 - MTCAT
Bedao Contest
0.40
19.1%
182
bedao_r07_number
Bedao Regular Contest 07 - NUMBER
Bedao Contest
0.10
68.1%
653
bedao_r07_train
Bedao Regular Contest 07 - TRAIN
Bedao Contest
0.50
15.1%
72
hello22_schoolplan
Bedao SCHOOLPLAN Hay Không? Hay Hay
Bedao Contest
1.30
11.6%
28
hello22_subsq
Bedao SUBSEQUENCE Hay Không? Hay Hay
Bedao Contest
0.50
49.7%
160
bedao_t1_anticell
Bedao Testing Contest 01 - ANTICELL
Bedao Contest
1.00
19.5%
55
bedao_t1_frac
Bedao Testing Contest 01 - FRAC
Bedao Contest
0.24
5.9%
238
bedao_t1_iwant
Bedao Testing Contest 01 - I WANT
Bedao Contest
0.10
40.2%
1303
bedao_t1_kthsum
Bedao Testing Contest 01 - KTHSUM
Bedao Contest
0.50
17.7%
245
bedao_t1_mine
Bedao Testing Contest 01 - MINE
Bedao Contest
0.40
21.5%
187
cf_edu1c
Codeforces Educational 1C - Nearest Vectors
Educational Codeforces
0.70
26.4%
63
cf_edu1d
Codeforces Educational 1D - Igor In The Museum
Educational Codeforces
0.30
29.7%
108
cf_edu1e
Codeforces Educational 1E - Chocolate Bar
Educational Codeforces
0.40
40.2%
73
cf_edu1f
Codeforces Educational 1F - Cut Length
Educational Codeforces
1.00
18.2%
7
cf_edu2c
Codeforces Educational 2C - Make Palindrome
Educational Codeforces
0.20
46.7%
106
cf_edu2d
Codeforces Educational 2D - Area of Two Circles' Intersection
Educational Codeforces
0.40
35.5%
30
cf_edu2e
Codeforces Educational 2E - Lomsat gelral
Educational Codeforces
0.60
42.8%
50
cf_edu2f
Codeforces Educational 2F - Edge coloring of bipartite graph
Educational Codeforces
1.00
36.4%
11
cf_edu3c
Codeforces Educational 3C - Load Balacing
Educational Codeforces
0.30
37.0%
59
cf_edu3d
Codeforces Educational 3D - Gadgets for dollars and pounds
Educational Codeforces
0.40
41.5%
27
cf_edu3e
Codeforces Educational 3E- Minimum spanning tree for each edge
Educational Codeforces
0.60
52.4%
64
cf_edu3f
Codeforces Educational 3F - Frogs and mosquitoes
Educational Codeforces
0.70
33.8%
19
errichto_matexp_cntpath
Matrix Exponentiation - Count path
Educational Codeforces
0.40
57.2%
122
errichto_matexp_cntpath2
Matrix Exponentiation - Count paths queries
Educational Codeforces
1.30
29.2%
44
errichto_matexp_fibonacci
Matrix Exponentiation - Fibonacci
Educational Codeforces
0.40
26.1%
279
errichto_matexp_knightpaths
Matrix Exponentiation - Knight Paths
Educational Codeforces
0.80
43.7%
59
errichto_matexp_minpath
Matrix Exponentiation - Min Path
Educational Codeforces
0.80
46.7%
51
errichto_matexp_randmood
Matrix Exponentiation - Random Mood
Educational Codeforces
0.30
58.3%
128
errichto_matexp_linearrecsequenc
Matrix Exponentiation - Recurrence With Square
Educational Codeforces
0.70
50.0%
32
errichto_matexp_stringmood
Matrix Exponentiation - String Mood
Educational Codeforces
0.50
63.2%
137
errichto_matexp_hstringupd
Matrix Exponentiation - String Mood Updates
Educational Codeforces
1.20
52.8%
44
coci1617_r1_cezar
COCI 2016/2017 - Contest 1 - Cezar
COCI
0.70
20.9%
21
coci1617_r1_jetpack
COCI 2016/2017 - Contest 1 - Jetpack
COCI
0.70
37.1%
35
coci1617_r1_kraji
COCI 2016/2017 - Contest 1 - Kraji
COCI
1.00
33.3%
1
coci1617_r1_mag
COCI 2016/2017 - Contest 1 - Mag
COCI
1.40
44.7%
13
coci1617_r1_tarifa
COCI 2016/2017 - Contest 1 - Tarifa
COCI
0.20
86.0%
177
coci1617_r1_vjestica
COCI 2016/2017 - Contest 1 - Vjestica
COCI
1.50
100.0%
6
coci1617_r2_burza
COCI 2016/2017 - Contest 2 - Burza
COCI
1.50
36.7%
9
coci1617_r2_go
COCI 2016/2017 - Contest 2 - Go
COCI
0.20
52.0%
60
coci1617_r2_nizin
COCI 2016/2017 - Contest 2 - Nizin
COCI
0.60
46.8%
33
coci1617_r2_prosjecni
COCI 2016/2017 - Contest 2 - Prosjecni
COCI
1.00
36.6%
20
coci1617_r2_tavan
COCI 2016/2017 - Contest 2 - Tavan
COCI
0.40
41.7%
18
coci1617_r2_zamjene
COCI 2016/2017 - Contest 2 - Zamjene
COCI
1.50
25.6%
5
coci1617_r3_imena
COCI 2016/2017 - Contest 3 - Imena
COCI
0.20
61.5%
15
coci1617_r3_kronican
COCI 2016/2017 - Contest 3 - Kronican
COCI
1.20
49.4%
75
coci1617_r3_kvalitetni
COCI 2016/2017 - Contest 3 - Kvalitetni
COCI
1.30
100.0%
1
coci1617_r3_meksikanac
COCI 2016/2017 - Contest 3 - Meksikanac
COCI
1.50
66.7%
2
coci1617_r3_pohlepko
COCI 2016/2017 - Contest 3 - Pohlepko
COCI
0.40
10.0%
9
coci1617_r3_zoltan
COCI 2016/2017 - Contest 3 - Zoltan
COCI
1.50
51.3%
23
«
1
2
3
4
5
6
...
57
58
»